Agreements with Endospan (Details) $ in Thousands		1 Months Ended			3 Months Ended		9 Months Ended
	Sep. 11, 2019 USD ($)	May 31, 2023 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) tranche	Sep. 30, 2022 USD ($)
Variable Interest Entity [Line Items]
Securities purchase option agreement, expiration period							90 days
Number of tranches | tranche							3
Expense					$ 1,911	$ 3,661	$ 5,189	$ 7,564
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Securities purchase option agreement				$ 1,000
Per three tranches of funding	$ 5,000
Funded second tranche payment		$ 5,000	$ 5,000
Required percentage of number of patients before tranche of loan funding can be acquired		50.00%
Expense							$ 5,000
Variable Interest Entity, Primary Beneficiary | Minimum
Variable Interest Entity [Line Items]
Option to purchase outstanding securities				350,000
Variable Interest Entity, Primary Beneficiary | Maximum
Variable Interest Entity [Line Items]
Option to purchase outstanding securities				$ 450,000
Secured Debt | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Loan provided	15,000
JOTEC GmbH | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Distribution fee	$ 9,000